| `minio_cluster_notification_current_send_in_progress` | `counter` | Number of concurrent async Send calls active to all targets                              |        |
| `minio_cluster_notification_events_errors_total`      | `counter` | Events that were failed to be sent to the targets                                        |        |

| `minio_notify_current_send_in_progress`        | Number of concurrent async Send calls active to all targets (deprecated, please use 'minio_notify_target_current_send_in_progress' instead) |
| `minio_notify_events_errors_total`             | Events that were failed to be sent to the targets (deprecated, please use 'minio_notify_target_failed_events' instead)                      |